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US Patent 7662059 Lubrication of windmilling journal bearings

Patent 7662059 was granted and assigned to United Technologies on February, 2010 by the United States Patent and Trademark Office.

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Patent
Patent

Patent attributes

Current Assignee
United Technologies
United Technologies
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7662059
Patent Inventor Names
Michael E. McCune0
Date of Patent
February 16, 2010
Patent Application Number
11582581
Date Filed
October 18, 2006
Patent Citations Received
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US Patent 12123432 Low noise turbine for geared turbofan engine
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0
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US Patent 12084978 Epicyclic gear train
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US Patent 12085025 Gas turbine engine compressor arrangement
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US Patent 12123356 Gas turbine engine with higher low spool torque-to-thrust ratio
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US Patent 11661906 Propulsion system arrangement for turbofan gas turbine engine
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US Patent 11661894 Geared turbine engine with relatively lightweight propulsor module
0
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US Patent 11680492 Epicyclic gear train
0
...
Patent Primary Examiner
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Tisha D Lewis
Patent abstract

A support shaft provides lubrication to a journal bearing during windmilling operation of a gear set. A primary oil pump provides oil from an oil supply during driven operation of the fan, and a secondary oil pump provides oil from an internal sump during windmilling operation of the fan. During driven operation of the fan, oil is pumped with the primary oil pump through a primary oil flow path to an outer surface of the support shaft. During windmilling fan operation, oil is pumped from an internal sump with a secondary oil pump through the secondary oil flow path. The secondary oil flow path has a smaller flow capacity, and the secondary oil pump is a smaller capacity pump.

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